Incident details
Operator, cause, commodity and consequences with raw source fields.
HL incident on 2024-11-01 — TX
Operator
Dow Pipeline Llc - Cayuse
Cause
Miscellaneous Root Causes
Commodity
Hvl Or Other Flammable Or Toxic Fluid Which Is A Gas At Ambient Conditions
Program
HL
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$437,000
Incident datetime
2024-11-01 00:00 UTC
Report number
Location
TX
Narrative
On 10/3/24 enterprise pipeline contacted dow pipeline - cayuse about a leak in a shared corridor. Leak was located in a shallow drainage ditch with about 1 inch of water. Enterprise operator noticed small bubbles in the water. Dow (cayuse) operator arrived at enterprise's site at 11:04 am and was safety orientated then escorted to the leak site at 11:12 am. Dow operator called control room to shutdown upstream pump station at 11:15 am. At 11:38 am pressure on the pipeline was 810 psig, which activated the low-pressure automatic valve downstream to close. At this time the bubbles in the water stopped, which verified the leak source was dow pipeline - cayuse. The cayuse pipeline was flared down to 0 pressure then excavated for repair. The leak was found on the pipe at approximately the 10 o'clock position. Leak segment was cut out and replaced. The volume of product that leaked was not above the reportable limit. The repair cost was above the reportable limit.
Detailed record list
Report Received Date
2024-11-01 00:00:00
Iyear
2024
Report Number
20240260
Supplemental Number
40210
Report Type
Supplemental
Operator Id
2162
Name
Dow Pipeline Llc - Cayuse
Operator Street Address
1000 Co. Rd. 340
Operator City Name
Angleton
Operator State Abbreviation
TX
Operator Postal Code
77515
Time Zone
Central
Daylight Savings Ind
Yes
Location Latitude
29.862508
Location Longitude
-94.902246
Commodity Released Type
Hvl Or Other Flammable Or Toxic Fluid Which Is A Gas At Ambient Conditions
Commodity Subtype
Lpg (Liquefied Petroleum Gas) / Ngl (Natural Gas Liquid)
Unintentional Release Bbls
0.1
Intentional Release Bbls
2694
Recovered Bbls
0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Accident Identifier
Local Operating Personnel, Including Contractors
Operator Type
Operator Employee
System Part Involved
Onshore Pipeline, Including Valve Sites
On Off Shore
Onshore
Status When Identified
Normal Operation, Includes Pauses Between Batches And During Maintenance
Shutdown Due Accident Ind
Yes
Communication State Fed Ind
Yes
Party Initiated Communication
Operator
Nrc Rpt Num
1412690
Additional Nrc Report Numbers
1412817
Ignite Ind
No
Upstream Action Taken
Valve Closure
Upstream Valve Type Ind
Automatic
Downstream Action Taken
Valve Closure
Downstream Valve Type Ind
Automatic
Num Pub Evacuated
0
Pipe Fac Name
Gcpl_ca (Mt Belvieu To Hwy 1148)_8in
Segment Name
Gcpl_ca (Mt Belvieu To Hwy 1148)_8in
Onshore State Abbreviation
Tx
Onshore Postal Code
77580
Onshore City Name
Mont Belvue
Onshore County Name
Chambers
Designated Location
Milepost
Designated Name
1 From Mbps
Federal
No
Location Type
Pipeline Right-Of-Way
Incident Area Type
Underground
Incident Area Subtype
Under Soil
Depth Of Cover
50
Crossing
No
Pipe Facility Type
Interstate
Item Involved
Pipe
Pipe Type
Pipe Body
Puddle Weld Ind
No
Pipe Diameter
8
Pipe Wall Thickness
0.219
Pipe Smys
35000
Pipe Specification
Api 6l
Pipe Seam Type
Erw - High Frequency
Pipe Manufacturer
Unknown
Pipe Coating Type
Fusion Bonded Epoxy(Fbe)
Coating Applied Ind
Yes
Installation Year
1974
Manufactured Year
1974
Material Involved
Carbon Steel
Release Type
Leak
Leak Type
Crack
Wildlife Impact Ind
No
Soil Contamination
No
Long Term Assessment
No
Remediation Ind
No
Water Contam Ind
No
Could Be Hca
Yes
Commodity Reached Hca
Yes
High Pop Ind
Yes
High Pop Yes No
Yes
Other Pop Ind
Yes
Other Pop Yes No
No
Est Cost Oper Paid
0
Est Cost Gas Released
24000
Est Cost Prop Damage
437000
Est Cost Emergency
100
Est Cost Environmental
0
Est Cost Other
0
Prpty
461100
Num Persons Hosp Not Ovnght
0
Num Injured Treated By Emt
0
Num Resident Building Affctd
0
Num Business Building Affctd
0
Accident Psig
1434
Mop Psig
2160
Mop Cfr Section
Subpart E Pressure Test �195.406(A)(3)
Maop Established Date
1974-01-01 00:00:00
Maop Reversal Flow Ind
Bi-Directional
Accident Pressure
Pressure Did Not Exceed Mop
Pressure Restriction Ind
No
Length Segment Isolated
41368
Internal Inspection Ind
Yes
Operation Complications Ind
No
Pipeline Function
> 20% Smys Regulated Transmission
Scada In Place Ind
Yes
Scada Operating Ind
Yes
Scada Functional Ind
Yes
Scada Detection Ind
No
Scada Conf Ind
Yes
Cpm In Place Ind
Yes
Cpm Operating Ind
Yes
Cpm Functional Ind
Yes
Cpm Detection Ind
No
Cpm Conf Ind
No
Investigation Status
No, the operator did not find that an investigation of the controller(s) actions or control room issues was necessary due to: (provide an explanation for why the operator did not investigate)
Investigation Status Details
Leak was reported on the right-of-way from another operator's field personnel. Leak was a pinhole at 50 inches underground. Cr personnel were notified of the leak and assisted in the shutdown of the pipeline.
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Excavation Damage
Cause Details
Previous Damage Due To Excavation Activity
Ex Party Type
Previous Damage Due To Excavation Activity
Prior Notification Ind
No
State Law Exempt Ind
Unknown
Notify Cga Dirt
No
Private Row Ind
Yes
Private Subtype
Private Easement
Joint Trench Ind
No
Cross Bore Ind
No
Depth Of Grade
Measured Depth From Grade
Depth Of Grade Detail
50
Excavator Type
Unknown/other
Excavator Equipment
Unknown/other
Work Performed
Unknown/other
One Call Notified Ind
No
Locator Type
Unknown/other
Visible Marks
Unknown/other
Service Interruption
Yes
Service Interruption Hours
319
Root Cause Category
Miscellaneous Root Causes
Root Cause Type
Previous Damage
Collected Data Ind
Yes
Axial Magnetic Flx Lkg Ind
Yes
Geometry Deformation Ind
Yes
Axial Recent Year
2024
Axial Rcnt Propul Method
Free Swimming
Axial Rcnt Attuned Detect
Metal Loss
Axial Rcnt Atnd Dtct Metal
High Resolution
Axial Previous Year
2019
Axial Prev Propul Method
Free Swimming
Axial Prev Attuned Detect
Metal Loss
Axial Prev Atnd Dtct Metal
High Resolution
Geometry Recent Year
2024
Geometry Rcnt Propul Method
Free Swimming
Geometry Rcnt Resolution
High Resolution
Geometrt Rcnt Measur Cups
Inside Ili Cups
Geometry Previous Year
2019
Geometry Prev Propul Method
Free Swimming
Geometry Prev Resolution
High Resolution
Geometrt Prev Measur Cups
Inside Ili Cups
Insp Compl Before Damage Ind
No
Has Hydrtst Conduc Before Ind
No
Direct Asmnt Conducted
No
Non Destructive Exam Ind
No
Preparer Name
R**** G*****
Preparer Title
Regulatory Compliance Manager
Preparer Email
R*******@d**.com
Preparer Telephone
979-238-3469
Prepared Date
2024-11-12 00:00:00
Local Contact Name
J** I****
Local Contact Email
J*****@d**.com
Local Contact Telephone
409-332-7066
Authorizer Name
R**** G*****
Authorizer Telephone
979-238-3469
Authorizer Title
Regulatory Compliance Manager
Authorizer Email
R*******@d**.com
Narrative
On 10/3/24 enterprise pipeline contacted dow pipeline - cayuse about a leak in a shared corridor. Leak was located in a shallow drainage ditch with about 1 inch of water. Enterprise operator noticed small bubbles in the water. Dow (cayuse) operator arrived at enterprise's site at 11:04 am and was safety orientated then escorted to the leak site at 11:12 am. Dow operator called control room to shutdown upstream pump station at 11:15 am. At 11:38 am pressure on the pipeline was 810 psig, which activated the low-pressure automatic valve downstream to close. At this time the bubbles in the water stopped, which verified the leak source was dow pipeline - cayuse. The cayuse pipeline was flared down to 0 pressure then excavated for repair. The leak was found on the pipe at approximately the 10 o'clock position. Leak segment was cut out and replaced. The volume of product that leaked was not above the reportable limit. The repair cost was above the reportable limit.
| Report Received Date | 2024-11-01 00:00:00 |
|---|---|
| Iyear | 2024 |
| Report Number | 20240260 |
| Supplemental Number | 40210 |
| Report Type | Supplemental |
| Operator Id | 2162 PHMSA Enforcement |
| Name | Dow Pipeline Llc - Cayuse |
| Operator Street Address | 1000 Co. Rd. 340 |
| Operator City Name | Angleton |
| Operator State Abbreviation | TX |
| Operator Postal Code | 77515 |
| Time Zone | Central |
| Daylight Savings Ind | Yes |
| Location Latitude | 29.862508 Google Maps OpenStreetMap |
| Location Longitude | -94.902246 Google Maps OpenStreetMap |
| Commodity Released Type | Hvl Or Other Flammable Or Toxic Fluid Which Is A Gas At Ambient Conditions |
| Commodity Subtype | Lpg (Liquefied Petroleum Gas) / Ngl (Natural Gas Liquid) |
| Unintentional Release Bbls | 0.1 |
| Intentional Release Bbls | 2694 |
| Recovered Bbls | 0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Accident Identifier | Local Operating Personnel, Including Contractors |
| Operator Type | Operator Employee |
| System Part Involved | Onshore Pipeline, Including Valve Sites |
| On Off Shore | Onshore |
| Status When Identified | Normal Operation, Includes Pauses Between Batches And During Maintenance |
| Shutdown Due Accident Ind | Yes |
| Communication State Fed Ind | Yes |
| Party Initiated Communication | Operator |
| Nrc Rpt Num | 1412690 NRC Report How to search |
| Additional Nrc Report Numbers | 1412817 |
| Ignite Ind | No |
| Upstream Action Taken | Valve Closure |
| Upstream Valve Type Ind | Automatic |
| Downstream Action Taken | Valve Closure |
| Downstream Valve Type Ind | Automatic |
| Num Pub Evacuated | 0 |
| Pipe Fac Name | Gcpl_ca (Mt Belvieu To Hwy 1148)_8in |
| Segment Name | Gcpl_ca (Mt Belvieu To Hwy 1148)_8in |
| Onshore State Abbreviation | Tx |
| Onshore Postal Code | 77580 |
| Onshore City Name | Mont Belvue |
| Onshore County Name | Chambers |
| Designated Location | Milepost |
| Designated Name | 1 From Mbps |
| Federal | No |
| Location Type | Pipeline Right-Of-Way |
| Incident Area Type | Underground |
| Incident Area Subtype | Under Soil |
| Depth Of Cover | 50 |
| Crossing | No |
| Pipe Facility Type | Interstate |
| Item Involved | Pipe |
| Pipe Type | Pipe Body |
| Puddle Weld Ind | No |
| Pipe Diameter | 8 |
| Pipe Wall Thickness | 0.219 |
| Pipe Smys | 35000 |
| Pipe Specification | Api 6l |
| Pipe Seam Type | Erw - High Frequency |
| Pipe Manufacturer | Unknown |
| Pipe Coating Type | Fusion Bonded Epoxy(Fbe) |
| Coating Applied Ind | Yes |
| Installation Year | 1974 |
| Manufactured Year | 1974 |
| Material Involved | Carbon Steel |
| Release Type | Leak |
| Leak Type | Crack |
| Wildlife Impact Ind | No |
| Soil Contamination | No |
| Long Term Assessment | No |
| Remediation Ind | No |
| Water Contam Ind | No |
| Could Be Hca | Yes |
| Commodity Reached Hca | Yes |
| High Pop Ind | Yes |
| High Pop Yes No | Yes |
| Other Pop Ind | Yes |
| Other Pop Yes No | No |
| Est Cost Oper Paid | 0 |
| Est Cost Gas Released | 24000 |
| Est Cost Prop Damage | 437000 |
| Est Cost Emergency | 100 |
| Est Cost Environmental | 0 |
| Est Cost Other | 0 |
| Prpty | 461100 |
| Num Persons Hosp Not Ovnght | 0 |
| Num Injured Treated By Emt | 0 |
| Num Resident Building Affctd | 0 |
| Num Business Building Affctd | 0 |
| Accident Psig | 1434 |
| Mop Psig | 2160 |
| Mop Cfr Section | Subpart E Pressure Test �195.406(A)(3) View CFR 49 §192 |
| Maop Established Date | 1974-01-01 00:00:00 |
| Maop Reversal Flow Ind | Bi-Directional |
| Accident Pressure | Pressure Did Not Exceed Mop |
| Pressure Restriction Ind | No |
| Length Segment Isolated | 41368 |
| Internal Inspection Ind | Yes |
| Operation Complications Ind | No |
| Pipeline Function | > 20% Smys Regulated Transmission |
| Scada In Place Ind | Yes |
| Scada Operating Ind | Yes |
| Scada Functional Ind | Yes |
| Scada Detection Ind | No |
| Scada Conf Ind | Yes |
| Cpm In Place Ind | Yes |
| Cpm Operating Ind | Yes |
| Cpm Functional Ind | Yes |
| Cpm Detection Ind | No |
| Cpm Conf Ind | No |
| Investigation Status | No, the operator did not find that an investigation of the controller(s) actions or control room issues was necessary due to: (provide an explanation for why the operator did not investigate) |
| Investigation Status Details | Leak was reported on the right-of-way from another operator's field personnel. Leak was a pinhole at 50 inches underground. Cr personnel were notified of the leak and assisted in the shutdown of the pipeline. |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Excavation Damage |
| Cause Details | Previous Damage Due To Excavation Activity |
| Ex Party Type | Previous Damage Due To Excavation Activity |
| Prior Notification Ind | No |
| State Law Exempt Ind | Unknown |
| Notify Cga Dirt | No |
| Private Row Ind | Yes |
| Private Subtype | Private Easement |
| Joint Trench Ind | No |
| Cross Bore Ind | No |
| Depth Of Grade | Measured Depth From Grade |
| Depth Of Grade Detail | 50 |
| Excavator Type | Unknown/other |
| Excavator Equipment | Unknown/other |
| Work Performed | Unknown/other |
| One Call Notified Ind | No |
| Locator Type | Unknown/other |
| Visible Marks | Unknown/other |
| Service Interruption | Yes |
| Service Interruption Hours | 319 |
| Root Cause Category | Miscellaneous Root Causes |
| Root Cause Type | Previous Damage |
| Collected Data Ind | Yes |
| Axial Magnetic Flx Lkg Ind | Yes |
| Geometry Deformation Ind | Yes |
| Axial Recent Year | 2024 |
| Axial Rcnt Propul Method | Free Swimming |
| Axial Rcnt Attuned Detect | Metal Loss |
| Axial Rcnt Atnd Dtct Metal | High Resolution |
| Axial Previous Year | 2019 |
| Axial Prev Propul Method | Free Swimming |
| Axial Prev Attuned Detect | Metal Loss |
| Axial Prev Atnd Dtct Metal | High Resolution |
| Geometry Recent Year | 2024 |
| Geometry Rcnt Propul Method | Free Swimming |
| Geometry Rcnt Resolution | High Resolution |
| Geometrt Rcnt Measur Cups | Inside Ili Cups |
| Geometry Previous Year | 2019 |
| Geometry Prev Propul Method | Free Swimming |
| Geometry Prev Resolution | High Resolution |
| Geometrt Prev Measur Cups | Inside Ili Cups |
| Insp Compl Before Damage Ind | No |
| Has Hydrtst Conduc Before Ind | No |
| Direct Asmnt Conducted | No |
| Non Destructive Exam Ind | No |
| Preparer Name | R**** G***** |
| Preparer Title | Regulatory Compliance Manager |
| Preparer Email | R*******@d**.com |
| Preparer Telephone | 979-238-3469 |
| Prepared Date | 2024-11-12 00:00:00 |
| Local Contact Name | J** I**** |
| Local Contact Email | J*****@d**.com |
| Local Contact Telephone | 409-332-7066 |
| Authorizer Name | R**** G***** |
| Authorizer Telephone | 979-238-3469 |
| Authorizer Title | Regulatory Compliance Manager |
| Authorizer Email | R*******@d**.com |
| Narrative | On 10/3/24 enterprise pipeline contacted dow pipeline - cayuse about a leak in a shared corridor. Leak was located in a shallow drainage ditch with about 1 inch of water. Enterprise operator noticed small bubbles in the water. Dow (cayuse) operator arrived at enterprise's site at 11:04 am and was safety orientated then escorted to the leak site at 11:12 am. Dow operator called control room to shutdown upstream pump station at 11:15 am. At 11:38 am pressure on the pipeline was 810 psig, which activated the low-pressure automatic valve downstream to close. At this time the bubbles in the water stopped, which verified the leak source was dow pipeline - cayuse. The cayuse pipeline was flared down to 0 pressure then excavated for repair. The leak was found on the pipe at approximately the 10 o'clock position. Leak segment was cut out and replaced. The volume of product that leaked was not above the reportable limit. The repair cost was above the reportable limit. |
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